DRAW ER diagram for the Scenario given below: In a country each CITIZEN is identified by CitizenCode. Other attributes of Citizen are: CitizenName and Contacts (person may have more than one contact). Officially, government allocate identification cards to avail services. IDENTYCARD has attributes: CardID (key) and Issue Date. Attributes of SERVICE are: ServiceCode (unique), ServiceTitle and ServiceDetail that consists of Type and

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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1. DRAW ER diagram for the Scenario given below:
In a country each CITIZEN is identified by CitizenCode.
Other attributes of Citizen are: CitizenName and Contacts
(person may have more than one contact). Officially,
government allocate identification cards to avail services.
IDENTYCARD has attributes: CardID (key) and Issue
Date. Attributes of SERVICE are: ServiceCode (unique),
ServiceTitle and ServiceDetail that consists of Type and
Price. A Citizen may possess maximum one identity card
or may not possess at all. The identity card belongs to only
one citizen. A citizen may register for many services or
may not register for any service. Each service may be
registered by many citizens or may not be registered at all.
During registration for the service RegistrationDate and
Duration must be also be stored.
2. Draw EER Diagram for the scenario described below:
A grocery shop stores data about its customers. Each
CUSTOMER has attributes: Customerld (identifier),
CustName and ContactNo. All the types of customers are
broadly classified into three types: RegularCustomer,
IrregularCustomer, and ShopEmployee. They are all different.
RegularCustomer have LoanAmount and LoanDuarion as
specialized attributes. IrregularCustomer have specialized
attributes called PaymentType and MaxOrders. Discount and
MaxPeriod are the specialized attributes that are stored for
ShopEmployee.
Transcribed Image Text:1. DRAW ER diagram for the Scenario given below: In a country each CITIZEN is identified by CitizenCode. Other attributes of Citizen are: CitizenName and Contacts (person may have more than one contact). Officially, government allocate identification cards to avail services. IDENTYCARD has attributes: CardID (key) and Issue Date. Attributes of SERVICE are: ServiceCode (unique), ServiceTitle and ServiceDetail that consists of Type and Price. A Citizen may possess maximum one identity card or may not possess at all. The identity card belongs to only one citizen. A citizen may register for many services or may not register for any service. Each service may be registered by many citizens or may not be registered at all. During registration for the service RegistrationDate and Duration must be also be stored. 2. Draw EER Diagram for the scenario described below: A grocery shop stores data about its customers. Each CUSTOMER has attributes: Customerld (identifier), CustName and ContactNo. All the types of customers are broadly classified into three types: RegularCustomer, IrregularCustomer, and ShopEmployee. They are all different. RegularCustomer have LoanAmount and LoanDuarion as specialized attributes. IrregularCustomer have specialized attributes called PaymentType and MaxOrders. Discount and MaxPeriod are the specialized attributes that are stored for ShopEmployee.
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